22921361 has 2 divisors, whose sum is σ = 22921362. Its totient is φ = 22921360.

The previous prime is 22921351. The next prime is 22921399. The reversal of 22921361 is 16312922.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16321600 + 6599761 = 4040^2 + 2569^2 .

It is a cyclic number.

It is not a de Polignac number, because 22921361 - 2²² = 18727057 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22921361.

It is not a weakly prime, because it can be changed into another prime (22921331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11460680 + 11460681.

It is an arithmetic number, because the mean of its divisors is an integer number (11460681).

Almost surely, 2^22921361 is an apocalyptic number.

It is an amenable number.

22921361 is a deficient number, since it is larger than the sum of its proper divisors (1).

22921361 is an equidigital number, since it uses as much as digits as its factorization.

22921361 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1296, while the sum is 26.

The square root of 22921361 is about 4787.6258208010. The cubic root of 22921361 is about 284.0622136070.

The spelling of 22921361 in words is "twenty-two million, nine hundred twenty-one thousand, three hundred sixty-one".